package io;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * 文件复制（单字节读写）
 */
public class CopyDemo {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("xg.jpg");
        FileOutputStream fos = new FileOutputStream("xg2.jpg");

        long start = System.currentTimeMillis();

        int d;
        while ((d=fis.read())!=-1){
            fos.write(d);
        }
        long end = System.currentTimeMillis();

        System.out.println("复制完毕，耗时"+(end-start)+"ms");

    }
}
